Use the image to answer the question.

5 | 3 5 5
4 | 0 0 0 1 4 6
3 | 7 7 8 8 9
2 | 1 3 4 5
Which number appears most frequently in the dataset shown in this stem-and-leaf plot?
A)55
B)77
C)88
D)40

The number that appears most frequently in the dataset is 5. This can be seen from the stem-and-leaf plot where the numbers 5 appear three times in the dataset. Therefore, the answer is:

A) 55